can i run a silver 10" CVR with a black 10" CVR?

I have been running my one black kicker cvr dual two ohms at 4 ohms on my RFt500.2 for a year an a saw an ad on craigslist for a silver cvr for 50 bucks an was wondering if these will run together so I can get more power out of them an finally run them on 2ohms